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System for wastewater oxidation treatment by using supercritical circulating water

A technology for oxidation treatment and circulating water, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of easy construction, high risk and strong applicability

Inactive Publication Date: 2014-02-05
NANJING TECH UNIV
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Problems solved by technology

[0007] Aiming at many problems faced by supercritical water treatment at present, the present invention provides a wastewater treatment system to solve the problem of low energy utilization rate of wastewater treatment and equipment corrosion Seriously, the blockage of inorganic salts can reduce the corrosion of wastewater to pipelines, get rid of relying on electric heating for wastewater, and can change different process conditions, realize mixed and centralized treatment of different types of sewage, and solve a series of technical problems that need to be overcome. Substantial progress has been made in the industrial application of supercritical water oxidation technology

Method used

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  • System for wastewater oxidation treatment by using supercritical circulating water
  • System for wastewater oxidation treatment by using supercritical circulating water

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Embodiment 2

[0031] See attached figure 2 , a system for supercritical circulating water oxidation treatment of wastewater, including supercritical steam boiler, reactor, steam generator, gas-liquid separation device and power cycle equipment, supercritical steam boiler, reactor, steam generator, gas-liquid separation The device and the power cycle equipment are connected end to end through pipelines to form a circulation treatment system. The system is also equipped with a heat exchanger, an auxiliary pulverized coal injection device and an oxidant injector. The first input end of the heat exchanger is connected to the output end of the gas-liquid separation device, the first output end is connected to the normal water and the tail gas discharge device through the decompression equipment, the second input end of the heat exchanger is connected to the soft water input pump, and the second The output end is connected with the soft water input end of the steam generator. The pulverized coa...

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Abstract

The invention provides a system for wastewater oxidation treatment by using supercritical circulating water. The system comprises a heating device, a reactor, a steam generator and a gas-liquid separation device which are sequentially connected end to end through pipelines to form a circulating treatment system, wherein the heating device is used for heating circulating water. In the system, the heating device is used for heating the circulating water to promote the whole treatment process to operate, sewage is up to a supercritical state through being mixed with the circulating water, a sewage preheating device in traditional sewage treatment is omitted, and the sewage with a high-concentration COD (Chemical Oxygen Demand) value can be directly treated.

Description

[0001] Technical field: [0002] The invention belongs to the fields of environmental protection and chemical industry, and in particular relates to a system for harmlessly treating refractory waste water and waste residue by using supercritical water. [0003] Background technique: [0004] At present, the industry is developing rapidly, and the accompanying pollution is becoming more and more serious. The treatment of many industrial waste water and waste gas has also become a problem. Some factories will dilute the diluted waste water to the national standard and then discharge it. Components, some wastewater is treated by blending combustion and oxidation, and secondary pollution will occur due to insufficient combustion. Most high-concentration wastewater is difficult to completely treat due to its complex composition, such as papermaking, printing and dyeing wastewater treatment decolorization, azo-based The degradation treatment of clusters, most of which are toxic to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08
Inventor 张阔廖传华李智超朱跃钊陈海军范红途
Owner NANJING TECH UNIV
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